User`s manual

4 Preparing Your Phone For Use
Charging requires approximately 4 hours.
When charging the phone while it is turned off, the external and
main displays will be activated, showing the animation.
If the charging is performed while the phone is on, the display will
show the icon. The lines showing the battery power level
will scroll until the battery is fully charged.
When the battery is out of power, the phone will play an alert
sound to remind you to recharge it and then will automatically turn
off.
Do not remove the battery while the phone is charging.